I have given upgrades to my wife and even turned some down when the coach seats were pretty bad (middle seat in a full row - yuck). Usually, we end up sitting together. In my upcoming trip to Hawaii, we have this situation again, but she is insisting that I take the upgrade and I'll keep the offer open to her. I don't know how this will play out, but it's never an issue with us in any case. Luckily, we did both get upgraded on the way back. I do my part by earning the upgrades with my status and gifting her with 2P/3P status every year as well.